Beverage mixer and cooler



May21,1946. w. A. NELSON ETAL .2,400,773

BEVERAGE MIXER AND COOLER 9 WWW 35% Inventor;

May 21, 1946.

W. A. NELSON ETAL BEVERAGE MIXER AND' COOLER 2 Sheets-Sheet 2 Filed April l1, 1945 Zeazzofj( JVeZSofz,

Attorneys Patentecl May 21, 1946 v "isEvaItAGEix/inmn No cooLE The presentin-vention has reference to adevice forlusein thecvooling and mixingpof certain beverages as milk shakes and the like and which are generally servedy-in la kcool state to the purchasing public;A the invention embodying a combined motor driven mixing and cooling device such as covered in our prior U. S. Letters Patent No. 2,319,429.

An important object of the present inventionis to provide a stationary hollow expansion chamber adapted for immersion in the liquid to be cooled together with an agitator adapted to travel around said expansion chamber.

A further object of the invention is to provide a combined scraper and agitator adapted to travel around the expansion chamber of circular or bulbous construction together with centrifugal responsive means for maintaining the scraper in contact with the expansion chamber during rotation of the agitator and scraper.

A still further object of the invention is to provide an apparatus of this character of simple and practical construction, which is efficient and reliable in operation, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended. l

Other objects and advantages reside in the de-` tails of construction and operation as more fully hereinafter described and claimed, reference bei ing had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view. f l

Figure 2 is a front elevational view.

Figure 3 is an enlarged vertical sectional view taken substantially on a line 3-3 of Figure 2, and

Figures 4 and 5 are transverse sectional views taken respectively on the lines 4--4 and 5-5 of 4 Figure 3.

i Referring more in detail to the drawings it will be seen that in the preferred embodiment thereof the invention comprises a stand of suitable shape and design and characterized by a base 5 from which rises a hollow post 6 on the upper end of which is suitably mounted and secured an electric motor 1.

The motor I includes a tubular armature shaft `a which extends below the casing ofthe motor and to which is secured a resilient agitator arm 9 by means of a clamping collar I0. The lower end of the arm 9 is curved longitudinally as indicated at II for a purpose to be more fully hereinafter described.

The post B is also provided with vertically Wilbur A; Nelson and lileamrz'n.iaenlmf.:` A l f.LosAngelesyCalifft drink, to b mixed tacle, I4 onilthe posta The receptacle III is adapt-- ed to,i.contain. 1iluid and 4 other 'ingredients of a l suchras `a milkshake or the; like, 'preparatory to servingthereof as a` beverage.,

Freely inserted through the shaft 8 of the motor are inner and outer tubes I5 and I6, respectively, the upper end of the outer tube being formed with a ange I'I and the inner tube being formed with a flange I8 spaced above the ange I'I to form a chamber I9 therebetween, the edges of the flanges being secured to the top of the motor housing by bolts 2l).

A valve housing 2I is formed at the upper end of the inner tube I5 having a refrigerant supply i pipe 22 attached thereto and also having a needle valve 23 adjustably mounted therein for controlling the feeding of refrigerant into the tube I5. A return tube 24 is attached to the flange I8 for the chamber I9 and by means of which the refrigerant is returned to a compressor (not shown).

The lower end of the. inner tube I5 extends downwardly through a hollow ball 25 having its walls spaced inwardly from a similar hollow ball 26 formed on the lower end of the outer tube I6. The space between the walls of the balls 25 and 26 forms an expansion chamber for the refrigerant as the same passes downwardly` through the tube I5 and into the ball 26 where it is returned upwardly through the tube I6 and return pipe 24.

The vertically curved scraper and agitator Il is normally spaced slightly outwardly from the surface of the ball 26 and a centrifugally rel spons'ive member 21 including a horizontally extending weighted portion 28 and a, split ring portion 29 surrounds the tubes I5 and I6 adjacent their lower portion and is attached to the lower portion of the resilient arm 9 by means of `a d screw or the like 3U, the weighted end portion 28 of the member 21 projecting outwardly at a side of the tube I5 opposite from the resilient arm 9. The ring portion 29is split to provide a gap 29' therein through which the agitator arm 9 may be inserted into said portion 29 when replacing said agitator.

Accordingly, in the operation of the device as the shaft 8 of the motor is rotated the arm 9 and combined scraper and agitator` II will likewise be rotated while the balls 25 and 26 remain stationary and the weighted end 28 of the mem- 55 ber 21 will move outwardly by centrifugal action spaced receptacle engaging elements I2 andi/I3` yfor engagingtand i retaining in positionv a recepwhereby to draw the scraper and agitator II inwardly toward the surface of the ball 26 into scraping contact therewith.

The expansion of the refrigerant in the ball 26 will serve to cool the same and th'us cool the contents of the receptacle I4.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed thata clear understanding'of the vconstruction, operation and advantages-of the device will be quite apparent to those skilled in this art.

A more detailed description is accordingly deemed Unnecessary.

It is to be understood, however, that even I though we have herein showngandy described a preferred embodiment of our invention thetslamek is susceptible to certain changes fully compre-A hended by the spirit o1 the invention as "herein from the chamber.

n 3. A beverage mixer of the class described comprising a bulbous cooling chamber including inner and outer spaced walls, means for circulating a cooling agent in the chamber, a combined motor driven agitator and scraper and including a resil- 1 lent arm and" a curved blade extending partly described and the scope of the appendedgclaims. g

Having thus described the invention, what we claim is: f

LA; beverage mixer of-l the class described andV including a stationary cooling vchamber, a com-r bined motor driven agitator and scraper 'mouri'tedV for movement around the'chamber, and speed; responsive means carried by thev combined agiaround the chamber and movable around the latter, and a Weighted member projecting laterally from rthe armV and responsive to centrifugal action to move the blade toward and away from the chamber. e

WILBUR A. NELSON.

ELEANOR K. NELSON. 

